pridmore



(No Model.) 2 sheets-snee; 1.

E. PRIDMORE. DISK HARROW. NO. 503,773. Patented Aug. 22,-1893,

gNo Moolex.)

E. PRIDMORB.

2 Sheets-Sheet 2.

` l DISK BARRO-W.

Patented Aug. 22,1893.

ummm? hp m Wil-Z1) fuego",

UNITED STATES PATENT OFFICE.

EDWARD PRIDMORE, OF BATAVIA, NEW YORK, ASSIGNOR TO THE JOHNSTON HARVESTER COMPANY, OF SAME PLACE.

DISK HARROW.

SPECIFICATION forming part of Letters Patent N0. 503,773, dated August 22, 1893. Application tiled November 2, 1891. Serial No. 410;(529. (No model.)

To all whom it may concern: l

Be it known that I, EDWARD PRIDMOEE, a citizen of the United States, residing at Batavia, in the county of Genesee and State of New York, have invented new and useful Improvements in Disk Harrows, of which the following is a specification.

This invention relates to a harrow having two gangs of concave-convex disks which are connected to the main supporting frame insuch manner as to be capable of both horizontal and vertical rocking movement thereon.

The objects of my invention are to produce a harrow in which the angle of each disk gang can be readily changed by the operator walking behind the harrow, so that the operator can thereby easily control the movements of the harrow and cause the same to follow an irregular line of plants, for instance in cultivating in vineyards; also to improve the construction of the main frame and the swiveling connection between the latter and the gangs; also to improve the device for adjusting the horizontal rocking movement of the gangs and to hold the latter rigidly against vertical movement when desired.

In the accompanying drawings consisting of two sheets, Figure l is a front elevation partly in section, of my improved harrow. Fig. 2 is a top plan View thereof. Fig. 3 is a fragmentary transverse section, on an enlarged scale, of one of the carrier plates and connecting parts in line u-u, Fig. 2. Fig. lt is a fragmentary rear elevation of the same. Fig. 5 is a horizontal sectionin line Fig. 3. Figs. 6, 7, 8 and 9 are vertical sections in lines 1 -o, tti-w, q/-y and ,eV-z, Fig 3 respectively. Fig. l0 is a top view of the adj ustable stop whereby the horizontal swinging movement of the disk gang is limited in one direction.

Like letters of reference refer to like parts in the several views.

A represents the draft pole and A a triangular supporting frame preferably made of iron or steel and secured to the rear portion of the draft pole. This supporting frame consists of a horizontal cross bar a which is secured centrally to the rear end of the pole, and two forwardly inclined braces a c made integrally with the cross bar and extending inwardly from the outer ends of the cross piece and secured with their front ends to the pole by a bolt d2. This forms a very siniple, rigid and durable support for the Working parts of the harrow.

B B represent two disk gangs which are arranged underneath the cross piece of the supporting frame.

C C represent yokes whereby the disk gangs are supported. Each of these yokes consists of a horizontal pivot plate c provided on opposite sides with depending arms c2 which latter have bearings c3 at their lower ends in which the disk gangs are journaled.

1 D represents brackets whereby the yokes of the disk gangs are supported and which are arranged in front of the cross bar d. Each of these brackets consists of a vertical plate d, a horizontal pivot plate d formed at the lower end of the vertical plate, and a vertical boss d2 extending upwardly from the horizontalplate on the front side of the vertical plate.

The yoke of each disk gang is pivoted to the bracket by abolt cl3 passing vertically through the boss d2 and the horizontal pivot plate,

thereby permitting the disk gang to turn or swivel horizontally.

` E E represent inclined handles attached to the rear portions of the yokes, whereby the angle of the disk gangs is adj usted'with reference to the line of draft. Each of these handles is provided at its lower end with a foot e, which rests upon a horizontal lug e' formed on the rear side of the yoke. The foot e is pivoted to the lug by a bolt e2.

e3 represents a fastening bolt passing through the lug e and a segmental slot e4 formed in the foot e, which in connection with the pivotal attachment permits of adjusting the horizontal position of the handles-with reference to the yoke.

F F represent adjustable stops whereby the outward throw of the disk gangs is regulated. Each of these stops consists of abolt arranged vertically in a lug f formed on the front side of the yoke. This stop moves with the yoke in adj Listing the angle of the gang and is provided with a head f2 on its upper end which strikes against one side of an arm f3 formed on the front side of the bracket, when-the yoke has reached the limit of its movement.

IOO

The upper head of this stop boltvis provided with a number of flat vertical sides f4 which are arranged at different distances from the center of the bolt, as represented in Fig. l0, so that upon turning the bolt in thelugf and tightening the same the distance which the strike against depending ears g formed onV one side of each of the armsfs. Y

H H represent carrier plates whereby the brackets are movably supported. These car-V rier plates are arranged vertically against the front side of the cross piece and provided with perforated bosses h at the upper and lower- -sides of the plates at the outer ends thereof.v

h represents clamping bars arranged vertically against the rear side of t-he cross piecey passing through said bars and the perforated bossesh of the carrier plates, whereby thelat-` ter are clamped upon the cross piece.` The innerends of the carrier plates are preferably clamped to the cross piece by ,meansof clamping bolts 7l passing through Athe carrier platesV and provided on their rear ends withY washers 7l which bear against the rear side of the cross piece, as represented in Figs. 2, 4 and7. -v

VJ J represent bolts passing vho1"-izo ntall5`f throughthe inner ends of the brackets,the carrier plates and the cross piece, whereby the brackets arepivotallysecured to the barrow frame, thereby permitting the disk gangs VtoV oscillateverteal'ly for the purpose, of adj ust-V ing themselves to the, inequalities of the ground.- The outer ends of the brackets are guided in their vertical movements by vertical barsk which `are arranged in f rent of the brackets and secured to the perforated bosses h by the lbolts h2.

krepresents hooks formed on the 4 upper sides of the carrier plates and overlapping the inner portions of the brackets adjacent to the retaining theinner ends of the brackets in place andrelieving the strain applied' to thein by the thrusts of the disks.

' The cross piece is provided with a seriesof openings kifor each pivot bolt J which permitsthe disk gangs to be kadj usted laterally in the frame for the purpose of increasing or reducing the width of the barrow.

l represents a seriesof horizontal openings formed in each bracket and adapted to register with openings Z formed in cachot the carrier plates. If desired, the disk gangs may be `lheld' rigidly by passing spring pins l? through the openings of the brackets andthe carrier plates, as representedinfFig'. 9, `there#- bypreventing the `disk gangsl from rocking vertically. By passing the pins Zithrough one of the higher openings in the brackets,

the disk gangsmay be held in an' inclined position. Y

As represented in Figs. 1 and 2, the concave sides of 'the disks face outwardly, which effects 4an outward throw of the soil. Upon relmoving the pivot bolts J, the rear clamping rbars vh andthe clamping bolts z, the disk gangs can be transposed or interchanged in the-usual manner, so that the concave sides of the disks face inwardly and the soil is thrown inwardly.

In using the harrow, theoperator can readily inclinev both or only one of the disk gangs by means of the handles according to the varying conditions of the work. When the disk gangs are straight or when both gangsare in- @lined au the Same angie, tne'hsrrew vjvni travel straight ahead.' But if one gangis straightl andthe other inclined,for o 11e is mf clined more than the other, the .harrow will travel obliquely toward the side of;F the gang having the least inclin'ati 1 1; By thisv means and secured to the carrier plates by bolts h? the operator has lperfect control of the bar row and ,can readilydirect' the' movementsof the barrow, as the nature ofl 4 the'wcn-k may demand. The gangsv are perfectly free t be s w un genl their pivots excepting that thejstcps mark `thepo'sition in whichthedisks have the desired angle. This enables the operatorto move each gang freely on itspiv'o'uand independently Of the' other swans, may be. ncessary for the purpose of guiding the ha'rrow in .following a c'reoke'd from and to return" each gang kto its 'proper angle without any effgrjg,

`When the'disks :treat-ranged with their con- -cave sides outwardly the tendency of the gangs is to cut deepest at their outer ends. In this position fo'f the gangs thehorizontal pivotsJ are arranged on the inner-sides of the vertical pivots .of the gangs 'and tlirowthe weight of the frame, `which may be' lc a"d ed, upon the inner ends of the gangsw This causes the harrow to run lighter and counteracts the tendencyto clit deepstat 'the outergenids. When the' gangs arereversedor Atransposed the" tendency is t0 .cut deepest at thefnner ends and this is counteracted by thweight of the frame which i s, .n0,w tl1ro`w n upntlie pivot bolts J, thereby assisting the latter in outer ends of the gangsbejcause the;11' o1" i z`onf` tal pivots are now arranged on theouter sides of the vertical pivots. By arranging the horizontalpivots at a proper distancefrnitlie vertical pivots, the gangs can be practically balanced. Y I claim as my invention- E1. The combination with the harrewv of ldiskgangs connectedwitlr saidfra'r'n'e by upright pivots," handles securedtosaidg'angs and projecting rearwardly there f,rem, and

vstops whereby one angular positionpieach roo oted to said yokes, and whereby the position of the handles with reference to the disk gangs can be adjusted, and means whereby the handles can be secured in their adjusted positions, substantially as set forth.

3. The combination with the harrow frame, of a pivoted yoke, a disk gang journaled in said yoke, and a movable stop provided with different faces whereby the turning movement of the yoke can be arrested at different points, substantially as set forth.

4. The combination with the harrow frame provided with a bracket, of a yoke pivoted to said bracket, a disk gang journaled in said yoke, and a revoluble stop arranged on said yoke and adapted to engage against said bracket, substantially as set forth.

5. The combination with the harrow frame provided with a bracket, of a yoke pivoted to said bracket, a disk gang journaled to said yoke, a revoluble stop arranged on said yoke and provided with Hat sides arranged at different distances from the center of the stop and adapted to strike against the bracket, substantially as set forth.

6. The combination with the harrow frame and a bracket attached to said frame and provided with an arm or yoke pivoted to said bracket and provided with lugs on opposite sides, a bolt journaled in one of said lugs and having an irregular sided head adapted to strike one side of said arm, an ear formed on said arm and adapted to strike against the opposite lug, and a disk gang journaled'on the convex ends of the gangs, whereby the weight of the frame and load is applied to the convex ends of the gangs, substantially as set forth.

8. The combination with the harrow frame and the disk gang, of a carrier plate secured' to said frame and provided with a vertical series of openings, a movable bracket provided with a corresponding opening, and guided with one end upon said plate, a horizontal pivot bolt passing through the bracket and the carrier plate and frame, a fastening pin passing through the corresponding openings of the bracket and carrier plate,and a yoke connected with said bracket by a vertical bolt and provided with journals for the disk gang, substantially as set forth.

9. The combination with the harrow frame and the disk gang, of a carrier plate arranged in front of said frame and provided at one end with bosses, a bar arranged in rear .of said frame and secured to said bosses, a clamping bolt arranged in the opposite end of said carrier plate and bearing against said frame,

a bracket guided upon one end of the carrier plate by a bar secured to'said bosses, a horizontal bolt pivotally attaching the opposite end of the bracket to the carrier and said frame, a hook formed on the carrier plate and overhanging the bracket, and a yoke pivoted to said bracket by a vertical bolt and provided with journals for said disk gang, substantially as set forth.

Witness my hand this 29th day of September, isei.

EDWARD PRIDMORE.

Witnesses:

ALBERT J. GLAss, E. JI MocKFoRD. 

